This isn't really a 419. It sounds to me like the guy honestly wants Gabriel's help -- not as a sucker, but genuinely as a partner. He believes that Gabriel has skills that the bad guy can use to steal other people's money.
Of course, he might very well turn around and cut Gabriel out of his cut of the loot, but it looks at this stage like he wants a partner in crime.
The guy must have done a lot of work to find you.
Odd that someone who would put in that much research still doesn't understand that all-caps is a clear tipoff.